'Drip ... drip ... drip.' That's a good one - I'd forgotten that one until now.
Sure, unless it's overcast, then it can be an issue by March. But the other way of looking at it is that, unless it's sunny, then it isn't an issue at all. And I think that is Rob's point: it's annoying because people post it as though sunshine is inevitable.
When I stuck a video on YouTube of the March snowfall earlier this year, I made sure to label it 'Sledging in Somerset, 19 March 2018', complete with date, for this very reason: to emphasize that fantastic, lasting snow was possible at just 25 m above sea level, as far south as Somerset, as late as the second half of March. And that the reaction, should there be the prospect of it happening again, ought to be 'yippee', rather than an immediate 'oh, the sun will be too high in the sky by then'.
2 miles west of Taunton, 32 m asl, where "milder air moving in from the west" becomes
SNOWMAGEDDON.
Well, two or three times a decade it does, anyway.